This kit includes 2 components, each built and powder-coated in-house.
Transform Your Jeep’s Suspension for Maximum Off-Road Dominance
Take your 2007-2018 Jeep Wrangler JK to the next level with the CORE 4X4 JK Long Arm Kit (J-JK-C-LAK8)—a massive suspension upgrade that enhances articulation, ride quality, axle stability, and durability. This weld-on kit completely redefines your Jeep’s suspension geometry, delivering a longer arc of travel for smoother suspension movement, better traction, and unmatched off-road capability.
Designed for serious off-roaders, this kit features massively upgraded bracketry, extended-length control arms, and industry-leading materials for a stronger, more controlled, and more capable suspension system. Whether you're conquering extreme rock crawls, desert trails, or rugged terrain, this long arm kit provides unparalleled handling and durability.
Key Features and Benefits
- Unmatched suspension travel geometry optimization – The true long arm design extends the control arm mounting points, allowing for a longer arc of suspension travel. This results in a smoother ride, better flex, and superior traction across all terrains. Reduces axle steer and bump steer, improving both high-speed stability and low-speed crawling performance.
- Ultra-strong 7075 aluminum control arms with ‘memory’ – Constructed from massive 2-inch and 1.5-inch 7075 aluminum, these control arms offer a perfect blend of lightweight durability and flexibility. The ‘memory’ of 7075 aluminum means that when impacted off-road, the arms flex and return to their original shape rather than permanently bending—ensuring consistent suspension geometry and long-term reliability.
- Precision-welded 3/16” steel brackets for maximum durability – All frame and body mount brackets are laser-cut and precision-bent from 3/16” steel, delivering an unbreakable mounting system that eliminates flex and provides rock-solid stability. The rear frame brackets integrate body mount relocation, eliminating interference issues while reinforcing your Jeep’s structure.
- Full-width axle compatibility steel arm option – For optimal tire clearance and improved suspension geometry, full-width axles are recommended with 7075 aluminum control arms. For those retaining factory-sized axles, we offer a steel control arm option with optimized bends to ensure proper clearance and fitment.
- Weld-on installation for a permanent performance upgrade – This kit requires cutting and welding for installation, ensuring a permanent and incredibly strong suspension system. Professional installation is recommended for the best results.
Two-Stage Powder Coating for Maximum Durability
All control arms undergo a two-stage powder coating process for enhanced corrosion resistance and customization. This process includes a zinc primer base coat to prevent rust and extend longevity, followed by a top coat available in 10 colors to match your Jeep’s aesthetics. Brackets come raw steel to ensure proper welding after installation.
Proudly Made in the USA
At CORE 4X4, we manufacture our Long Arm Kits in Orem, UT, using only the highest quality American-sourced materials. Our commitment to strict quality control, rigorous testing, and precision engineering ensures every component is built to handle the toughest off-road conditions. By choosing CORE 4X4, you’re supporting American manufacturing and getting an unmatched product that delivers lasting performance.
Final Thoughts
The CORE 4X4 JK Long Arm Kit (J-JK-C-LAK8) is the ultimate suspension upgrade for Jeep Wrangler JK owners looking to push their off-road performance to new heights. With extended-length control arms, precision-engineered bracketry, and 7075 aluminum’s impact-resistant memory, this kit delivers maximum articulation, axle stability, and durability. Upgrade your Jeep Wrangler JK today with the CORE 4X4 Long Arm Kit and experience next-level suspension performance and ride quality, whether on the trail or the road!
Vehicle Fitment: Jeep Wrangler JK 07-18 – Drastically improves suspension performance by increasing articulation and down travel for unmatched off-road capability and ride quality, making it the ultimate upgrade for serious off-road enthusiasts.
CORE Advantage: This long arm kit extends the suspension's arc of travel, allowing for smoother suspension movement, better axle control, and enhanced ride quality. The increased down travel and articulation improve traction and stability over any terrain.
Adjustability: Designed with on-vehicle adjustability, this kit allows for precise axle positioning and alignment correction, accommodating 0 to 6 inches of lift while maintaining optimal suspension geometry and handling performance.
Construction: Built with ultra-durable 7075 aluminum (2” OD) for the front and rear lower control arms and 3/16” steel for precision-cut frame brackets, ensuring long-lasting performance, stability, and the ability to withstand extreme off-road abuse.
Two-Stage Powder Coating: Zinc primer base and top coat available in 10 vibrant colors protect against corrosion and allow for personalized styling of your rig.
Warranty and Origin: Proudly manufactured in the United States, our product includes a lifetime warranty on all non-wear items, providing you with confidence and peace of mind in your purchase.
Built With
Front Lower Control Arms Built With 1.75” OD 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.32” long threads.
Front Upper Control Arms Built With 1.5” OD 5/16” Wall DOM. Forged Johnny Joint on the adjustable end with an adjustable U-bracket on the other adjustable end with 1” x 14 TPI - 3.25” long threads.
Rear Lower Control Arms Built With 2” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.32” long threads.
Rear Upper Control Arms Built With 1.5” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1” x 14 TPI - 3.25” long threads.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Jeep | Wrangler | 2007 - 2018 |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
Construction & Materials
Front Lower Control Arms Built With 1.75” OD 5/16” Wall DOM. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.32” long threads.
Front Upper Control Arms Built With 1.5” OD 5/16” Wall DOM. Forged Johnny Joint on the adjustable end with an adjustable U-bracket on the other adjustable end with 1” x 14 TPI - 3.25” long threads.
Rear Lower control arms built with 2” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1.25” x 12 TPI - 2.32” long threads.
Rear Upper control arms built with 1.5” 7075 Aluminum. Forged Johnny Joints on both adjustable ends with 1” x 14 TPI - 3.25” long threads.
| Vehicle | Jeep Wrangler JK / JKU (07–18) |
| Brand | CORE 4X4 |
| Color | Black or Blue or Charcoal or Green or Light Green or Orange or Purple or Red or White or Yellow or Raw Aluminum or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Axle Setup | Full Width Front Axle (Aluminum Lowers) or Less than 70" axles (Bent Steel Lowers) |
| Placement on Vehicle | Front Upper, Front Lower, Rear Upper, Rear Lower, Front, Rear |
| Mounting Style | Weld-On |
Use the vehicle selector on our website to shop by your year, make, and model. On product pages, use the kit builder to select your color, series, lift height, and any add-on options, then add to cart. If you need help, call or email our team.
Standard orders typically ship within 1–3 business days of ordering. Custom color orders take approximately 5–10 business days. Because everything is built in-house, we can turn orders quickly even for custom specifications.
You can reach our team through the contact form on our website, or browse to the Contact Us page. Our team is available to answer pre-sale and technical questions before and after your purchase.
Reviews of Core 4x4
Specifications
| Color | Black, Blue, Charcoal, Green, Light Green, Orange, Purple, Red, White, Yellow, Raw Aluminum, Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Axle Setup | Full Width Front Axle (Aluminum Lowers), Less than 70" axles (Bent Steel Lowers) |
| Vehicle | Jeep Wrangler JK / JKU (07–18) |
| Brand | CORE 4X4 |
| Note to Core4x4: | - |
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